1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2f16c13ec56d9e693467d486537dcb28574971ee2d75a7a52afd3da61a586. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90789529-3e0c-48e6-a41f-8a0851861de3.json and https://artists.proofprofile.net/proofs/artist/90789529-3e0c-48e6-a41f-8a0851861de3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d877a6ef0b4c78bb87c7f2b4831345f8312af3833ce1853be8f6b2e6f9bb067. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHP2026187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9e7094b929c333a048cf0ddf1c20f0af0ceef5fc4c3b759f106c7e98857956. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:44:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM8DG2163680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0886c5fa8c038d02d306dda1d1dab082332c4e3bafb356abefb26773124b927a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2076852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4d0bd48a7eccc0c12e0fd09f415be34962d3055d23210c1baea0933f8b70ec. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS662176833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a36c521fd02d422a8896e75147ec7da42464959b650ddc4fb261a20f0b08d4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS632111024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b85ab69c3d2c6eadaa804a04f6bf7467dab360d4b688258938d084091eee2c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2192740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6294191428d22610586dcd844a89adf2b17368b41974da41c2e4ee3f2dde16. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72125043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10041d5967e869d871a76507169d01a5c4d019511456daf8af55fb5ee70afb7b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2200880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14c096428da6a6359ed9d74e40a58ffd7db8ff300bf99a3b4843d904e214910. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2265879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904812c505d4400e50a47e537b3af3401e73b3b018cd06d9a9366da6a6ef2a1b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2225836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef418b086798b8d748a8bcbf21a40f5ce598b7d3596f30a4e49d54195103c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2509746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d611fa257ba2132566631ed35634dabef9407d50659bb4b3c3563ab2e179d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62569726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9704b815353d70dffd953fabc16bb2513724d9808d9e2dcdef527c81ce8242. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2022217.